linux-kernel - Re: [PATCH 1/1] net: sched: Deletion of an unnecessary check before the function call "kfree"

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Message-ID: <546CC9B3.5060405@gmail.com>
Date:	Wed, 19 Nov 2014 08:47:47 -0800
From:	John Fastabend <john.fastabend@...il.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
CC:	"David S. Miller" <davem@...emloft.net>,
	Jamal Hadi Salim <jhs@...atatu.com>, netdev@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, Coccinelle <cocci@...teme.lip6.fr>
Subject: Re: [PATCH 1/1] net: sched: Deletion of an unnecessary check before
 the function call "kfree"

On 11/18/2014 12:26 PM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 18 Nov 2014 21:21:16 +0100
>
> The kfree() function tests whether its argument is NULL and then
> returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>   net/sched/cls_bpf.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
> index 0e30d58..f323944 100644
> --- a/net/sched/cls_bpf.c
> +++ b/net/sched/cls_bpf.c
> @@ -212,8 +212,7 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp,
>
>   	if (fp_old)
>   		bpf_prog_destroy(fp_old);
> -	if (bpf_old)
> -		kfree(bpf_old);
> +	kfree(bpf_old);
>
>   	return 0;
>
>

Maybe I need some coffee but I can't figure out what this
patch is against...

# grep bpf_old ./net/sched/cls_bpf.c
#

Marcus, what tree are you looking at?

-- 
John Fastabend         Intel Corporation
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